This turn of the century masterpiece has a mysterious goaty interloper.

Concrete strongholds stand guard over the Golden Gate.

Art in the form of a winding, man made crack in stone.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco's first World's Fair, dedicated to the wonders of California.

A century and a half of research in the sciences and natural history, still going strong.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

A man-made island in scenic San Francisco Bay.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A collection of colorful dinosaurs hidden in an actual rainforest.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

An enormous illuminated figure dances on the Las Vegas strip.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

San Francisco's newly reopened hands-on science museum.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

The remains of a ruined mansion memorialize the 1906 earthquake.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.